Mechanically-operated brake.



W, G. BRYAN & P. B. SHEATHER.

MEGHANICALLY O PERATED BRAKE. APPLICATION FILED P11113. 1918,

Patented Dec. 22. 1914.

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WILLIAM GEORGE BRYAN SOUTH WALES, AUSTRALIA.

MECHANICALLY-OPERATED BRAKE.

Specification of Letters Patent.

appneation med February s, 1913. serial Na7/15,911.

To all whom t may concern:

Be it known that we, WILLIAM GEORGE BRYAN and PERCIVAL BERNARD SHEATHER, citizens of the Commonwealth of Australia, residing at Sydney, New South lVales', in the Commonwealth of Australia, havejointly invented new and useful Improvements in lliechanically-Operated Brakes, of which the following is a specification. V

The object of this invention is to provide an effective expanding brake and clutch appliance, by combining upon an'axle, shaft, or spindle two circular disks having reciprocally operating parts. They are peripherally incased with a band or ring which is either attached to or forms an integral part of say, a motor car driving wheel, engine fly wheel, pulley, or other device to which the invention may be applied.

One disk, designated the actuator, has,

formed on its face either a continuous convolute channel, or segments of such, into which are inserted the projecting parts of radially moving slides incased in the companion disk. In conjunction with the radial slides, a self-releasing split spring ring is used, having horns fitting into the recessed ends of the slides. lVhen pressure is applied to the slides by rotating the actuator disk, the spring ring is expanded against the inner surface of the incasing band, and thus serves the purpose of either a brake or clutch. v

Referring to the accompanying drawings,

I Which form part of this specification: Figure 1 is an elevation of the actuator disk, showing continuous convolute channel with slide projecting parts thereon, also a split spring ring within an incasing band, the latter shown in section. Fig. 2 isa similar view to Fig. 1 of the actuator disk, but with segmental convolute channels in lieu of a continuous channel, arranged for operating in a reverse direction .to Fig. 1. Fig. 3 is an elevation of the companion disk, having radial slides associated with the split spring ring within an incasing band. Fig. 4 is an elevation of a radial slide, and portion of the split spring ri-ng with horns in gapped Fig. 5 is a central, longitudinal sectional elevation, showing the invention adapted to serve as a brake to the driving wheel of a motor car or such like. Fig. 6 is a central, longitudinal, sectional elevation, showing the invention adapted to part.

serve'as an expanding clutch for transmitting motion. Theactuator disk with slanting grooves in sleeve, isshown associated with, its companion slide carrying disk attached tov spindle. The spring ring and incasing band are also shown. Fig. 7 is a plan of Fig. 6, showing the-actuator disk and slide `carrier disks partly broken away, but with fixed spring seating collar, spring, grooved `sliding collar, forked actuating lever, also slanting channel in sleeve of actuator disk, and longitudinal groove (dotted) in shaft. Fig. Sv is a detail of a sliding collar fitting piece, having slanting andlongitudinal parts to lit in their respece tive grooves.

When utilizing the invention as a wheel brake, the Wheel A, secured to the driving axle orshaft B, has the band C fastened to it with lugs C1. It serves to incase the reciprocally operating parts of the slide carrier disk E and actuator disk G. The sleeve or tubular part D, in which the axle freely.

revolves, is rigidly attached toa convenient part of the under carriage by parts D1. Upon the male screw threaded end D2, boss E1, forming part of the slide carrier disk E, is secured against the security collar D1. Any suitable number of radial Slide channels 112 (dotted in Fig. 7 are formed -to receive the slides F, whose projecting parts F1 are fitted Vinto either the continuous convolute channel G1, Fig. l, or the segmental convolute channels G2, Fig. 2, sunk in actuator disk G, which is -maintained in its correct central position by the bearing balls G3, screw threaded cone H, and back nut H1, on the boss E1. These bearings also Patented ec. 22, 1914:.`

facilitate the rotary motion of the disk when pressure is applied t0 lever G'1 for ,the purf pose of putting on the brake. I. A

The split spring ring I is supported with its contact surface circumferentially Iequidistant from band C upon the slides F. the horns I1 fitting into the gaps F2 to keep the ring stationary, and to prevent it from revolving when the slides are pressed against it to expand it.

To render the ring I self releasing, 1t 1s made of a tapering thickness dispose equally for half its circumference from either side of the Split formation, and 1s expanded by inserting a block piece in the split I1 to increase the diameter before turning the outer or contact surface. Upon removal of the block piece the ring will again automatically assume the desired position when pressure is withdrawn from slides F. When utilizing the invention as a clutch appliance, as, for instance, when it is desired to couple up two pieces of shafting, one of which is associated with the prime mover, the same reciprocally operating parts are used, in the form shown in Figs. 6 and 7. The driving shaft B, with fly wheel B1, would be associated with the prime mover, but band C on fly wheel will become the transmitter or driver .when split spring ring I is in contact therewith, such contact being obtained by the rotary movement of actuator disk G and the radial movements of slides F. The primary turning of disk G is accomplished by means of fitting pieces J attached to the grooved collar K. The latter is caused to slide upon the sleeve L, which is part of disk G, by manipulating the forked lever M. The spring N, confined between collars K and O, serves to retain collar K in the home position, as shown, for producing contact of split spring ring I with band C. The fitting pieces are dual shaped, the parallel part J1 Abeing placed in the longitudinal channel P formed in the second shaft Ea to which slide carrier disk E is attached. -The upper diagonal part J2 is placed in the slanting channel L1. In Fig. 7 the relative positions of the longitudinal and diagonal channels are shown.

As shaft E3 is normally stationary, and sleeve L is to be rotated thereon within certain limitations, the bearing balls Q are used to facilitate motion and to prevent friction between the surfaces of the disks Il and G. Hence, when the fitting pieces J are moved along their respective channels, the part J2 in channel L1 will cause disk Gr to rotate and impart the necessary radial motion to slides F. Then ring I, being forced against band C, the resultant friction insures motion being imparted by the driving power.

To insure the accurate adjustment of the shafts B and E3 in line, the pointed end R on E8 is fitted into a correspondingly shaped recess in shaft B, and to minimize friction at that part, bearing balls S are used.

.Having now described our invention, what we claim as new and desire to secure by Letters Patent is l. A fixed radially channeled disk, in combination with slides movable in said channels having recesses in their outer ends and provided with projecting parts, a rotatable actuating disk provided with a convolute channel engaging said projecting parts, a circular band surrounding the first mentioned disk and an intervening split spring ring provided with horns which enter said recesses, said slides being adapted to be forced outward against said ring, for binding the latter against said band.

2. A fixed radially channeled disk, in combination with slides movable in said channels having recesses in their outer ends and provided with projecting parts, a rotatable actuating disk provided with a eonvolute channelengaging said projecting parts, a circular band surrounding the first mentioned disk and an intervening split spring ring provided with horns which enter said recesses and having its two halves reversely tapered to its ends, the said slides being adapted to be forced outward against Said ring for binding the latter against said band.

3. A fixed radially channeled disk, in combination with slides moving in said channels and provided with projecting parts, a rotatable actuating disk channeled in convolutions engaging said'projecting parts, a circular band surrounding the abovementioned disk and an intervening split spring ring provided with means for holding it in place and consisting of its two parts reversely tapered to the ends from a point opposite the split in the ring, the said slides being adapted to be forced outward against said ring for binding the latter against said band.

ln testimony whereof we have signed our 'names to this specification in the presence of two subscribing witnesses.

WILLIAM GEORGE BRYAN. PERCIVAL BERNARD SHEATHER.

Witnesses:

HARRY A. SMEDLEY, ll. C. CAMPBELL. 

